No, it does not use a Luxeon now, although I have seen a Luxeon prototype version more than two years ago.
I've just seen that their website is down. But here is some:
http://www.upaway.at/upaway/luxbrite.htm
(you never will guess who brought them to the idea carrying it!)
and
http://www.audax.uk.net/lights/brite0108.htm
at the bottom
The 229 has 9 Nichia 5mm LEDs and a boost converter. It works, as said on 2 AA cells, about 8 hours full power on alkalines, and a few hours more on decreasing brightness. It uses a Gelert housing which is just a copy from a PrinceTon Tec Matrix (or maybe it is the opposite case) but has a real switch opposed to the battery opening.
As these Gelert lamps are available for next to nothing, they make very good sources for spare parts (there was a series were the battery cap was too brittle and broke at a direct hit (quite common in a cave). They are sold for about 50-70 GBP.
There is also a 225 which just has 5 LEDs and therefore longer runtime at lower brightness.
using a Petzl spare part you can easily convert them to the standard caplamp holder.
They are small, lightweighted and affordable enough to carry two or more of them.
And I just found the Spanish site you are referring to:
Funny enough, it is the Spanish translation from something I wrote about problems with cave radios and switching power supplies in caving lamps.
